src/gtk1/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include <math.h>
  17
  18 //-----------------------------------------------------------------------------
  19 // local data
  20 //-----------------------------------------------------------------------------
  21
  22 #include "bdiag.xbm"
  23 #include "fdiag.xbm"
  24 #include "cdiag.xbm"
  25 #include "horiz.xbm"
  26 #include "verti.xbm"
  27 #include "cross.xbm"
  28 #define  num_hatches 6
  29
  30 static GdkPixmap  *hatches[num_hatches];
  31 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  32
  33 //-----------------------------------------------------------------------------
  34 // constants
  35 //-----------------------------------------------------------------------------
  36
  37 #define RAD2DEG 57.2957795131
  38
  39 //-----------------------------------------------------------------------------
  40 // temporary implementation of the missing GDK function
  41 //-----------------------------------------------------------------------------
  42 #include "gdk/gdkprivate.h"
  43 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  44                           GdkGC        *gc,
  45                           GdkDrawable  *src,
  46                           gint          xsrc,
  47                           gint          ysrc,
  48                           gint          xdest,
  49                           gint          ydest,
  50                           gint          width,
  51                           gint          height)
  52 {
  53     GdkWindowPrivate *drawable_private;
  54     GdkWindowPrivate *src_private;
  55     GdkGCPrivate *gc_private;
  56
  57     g_return_if_fail (drawable != NULL);
  58     g_return_if_fail (src != NULL);
  59     g_return_if_fail (gc != NULL);
  60
  61     drawable_private = (GdkWindowPrivate*) drawable;
  62     src_private = (GdkWindowPrivate*) src;
  63     if (drawable_private->destroyed || src_private->destroyed)
  64         return;
  65
  66     gc_private = (GdkGCPrivate*) gc;
  67
  68     if (width == -1) width = src_private->width;
  69     if (height == -1) height = src_private->height;
  70
  71     XCopyPlane( drawable_private->xdisplay,
  72                 src_private->xwindow,
  73                 drawable_private->xwindow,
  74                 gc_private->xgc,
  75                 xsrc, ysrc,
  76                 width, height,
  77                 xdest, ydest,
  78                 1 );
  79 }
  80
  81 //-----------------------------------------------------------------------------
  82 // wxPaintDC
  83 //-----------------------------------------------------------------------------
  84
  85 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxDC)
  86
  87 wxPaintDC::wxPaintDC(void)
  88 {
  89     m_penGC = (GdkGC *) NULL;
  90     m_brushGC = (GdkGC *) NULL;
  91     m_textGC = (GdkGC *) NULL;
  92     m_bgGC = (GdkGC *) NULL;
  93     m_cmap = (GdkColormap *) NULL;
  94     m_isMemDC = FALSE;
  95 }
  96
  97 wxPaintDC::wxPaintDC( wxWindow *window )
  98 {
  99     m_penGC = (GdkGC *) NULL;
 100     m_brushGC = (GdkGC *) NULL;
 101     m_textGC = (GdkGC *) NULL;
 102     m_bgGC = (GdkGC *) NULL;
 103     m_cmap = (GdkColormap *) NULL;
 104
 105     if (!window) return;
 106     GtkWidget *widget = window->m_wxwindow;
 107     if (!widget) return;
 108     m_window = widget->window;
 109     if (!m_window) return;
 110     if (window->m_wxwindow)
 111         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 112     else
 113         m_cmap = gtk_widget_get_colormap( window->m_widget );
 114
 115     m_isMemDC = FALSE;
 116
 117     SetUpDC();
 118 }
 119
 120 wxPaintDC::~wxPaintDC(void)
 121 {
 122     Destroy();
 123 }
 124
 125 void wxPaintDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
 126                            wxColour *WXUNUSED(col), int WXUNUSED(style) )
 127 {
 128     wxFAIL_MSG( "wxPaintDC::FloodFill not implemented" );
 129 }
 130
 131 bool wxPaintDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 132 {
 133     wxFAIL_MSG( "wxPaintDC::GetPixel not implemented" );
 134     return FALSE;
 135 }
 136
 137 void wxPaintDC::DrawLine( long x1, long y1, long x2, long y2 )
 138 {
 139     if (!Ok()) return;
 140
 141     if (m_pen.GetStyle() != wxTRANSPARENT)
 142     {
 143         gdk_draw_line( m_window, m_penGC,
 144                        XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 145     }
 146
 147     CalcBoundingBox(x1, y1);
 148     CalcBoundingBox(x2, y2);
 149 }
 150
 151 void wxPaintDC::CrossHair( long x, long y )
 152 {
 153     if (!Ok()) return;
 154
 155     if (m_pen.GetStyle() != wxTRANSPARENT)
 156     {
 157         int w = 0;
 158         int h = 0;
 159         GetSize( &w, &h );
 160         long xx = XLOG2DEV(x);
 161         long yy = YLOG2DEV(y);
 162         gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 163         gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 164     }
 165 }
 166
 167 void wxPaintDC::DrawArc( long x1, long y1, long x2, long y2, double xc, double yc )
 168 {
 169     if (!Ok()) return;
 170
 171     long xx1 = XLOG2DEV(x1);
 172     long yy1 = YLOG2DEV(y1);
 173     long xx2 = XLOG2DEV(x2);
 174     long yy2 = YLOG2DEV(y2);
 175     long xxc = XLOG2DEV((long)xc);
 176     long yyc = YLOG2DEV((long)yc);
 177     double dx = xx1 - xxc;
 178     double dy = yy1 - yyc;
 179     double radius = sqrt(dx*dx+dy*dy);
 180     long   r      = (long)radius;
 181     double radius1, radius2;
 182
 183     if (xx1 == xx2 && yy1 == yy2)
 184     {
 185         radius1 = 0.0;
 186         radius2 = 360.0;
 187     }
 188     else
 189     if (radius == 0.0)
 190     {
 191         radius1 = radius2 = 0.0;
 192     }
 193     else
 194     {
 195         radius1 = (xx1 - xxc == 0) ?
 196             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 197             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 198         radius2 = (xx2 - xxc == 0) ?
 199             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 200             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 201     }
 202     long alpha1 = long(radius1 * 64.0);
 203     long alpha2 = long((radius2 - radius1) * 64.0);
 204     while (alpha2 <= 0) alpha2 += 360*64;
 205     while (alpha1 > 360*64) alpha1 -= 360*64;
 206
 207     if (m_brush.GetStyle() != wxTRANSPARENT)
 208         gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 209
 210     if (m_pen.GetStyle() != wxTRANSPARENT)
 211         gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 212
 213     CalcBoundingBox (x1, y1);
 214     CalcBoundingBox (x2, y2);
 215 }
 216
 217 void wxPaintDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 218 {
 219     if (!Ok()) return;
 220
 221     long xx = XLOG2DEV(x);
 222     long yy = YLOG2DEV(y);
 223     long ww = m_signX * XLOG2DEVREL(width);
 224     long hh = m_signY * YLOG2DEVREL(height);
 225
 226     // CMB: handle -ve width and/or height
 227     if (ww < 0) { ww = -ww; xx = xx - ww; }
 228     if (hh < 0) { hh = -hh; yy = yy - hh; }
 229
 230     long start = long(sa * 64.0);
 231     long end = long(ea * 64.0);
 232     if (m_brush.GetStyle() != wxTRANSPARENT)
 233         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 234
 235     if (m_pen.GetStyle() != wxTRANSPARENT)
 236         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 237
 238     CalcBoundingBox (x, y);
 239     CalcBoundingBox (x + width, y + height);
 240 }
 241
 242 void wxPaintDC::DrawPoint( long x, long y )
 243 {
 244     if (!Ok()) return;
 245
 246     if (m_pen.GetStyle() != wxTRANSPARENT)
 247         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 248
 249     CalcBoundingBox (x, y);
 250 }
 251
 252 void wxPaintDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 253 {
 254     if (!Ok()) return;
 255
 256     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 257     if (n <= 0) return;
 258
 259     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 260
 261     for (int i = 0; i < n-1; i++)
 262     {
 263         long x1 = XLOG2DEV(points[i].x + xoffset);
 264         long x2 = XLOG2DEV(points[i+1].x + xoffset);
 265         long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 266         long y2 = YLOG2DEV(points[i+1].y + yoffset);
 267         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 268
 269         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 270     }
 271 }
 272
 273 void wxPaintDC::DrawLines( wxList *points, long xoffset, long yoffset )
 274 {
 275     if (!Ok()) return;
 276
 277     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 278
 279     wxNode *node = points->First();
 280     if (!node) return;
 281
 282     wxPoint *pt = (wxPoint*)node->Data();
 283     CalcBoundingBox( pt->x + xoffset, pt->y + yoffset );
 284
 285     while (node->Next())
 286     {
 287         wxPoint *point = (wxPoint*)node->Data();
 288         wxPoint *npoint = (wxPoint*)node->Next()->Data();
 289         long x1 = XLOG2DEV(point->x + xoffset);
 290         long x2 = XLOG2DEV(npoint->x + xoffset);
 291         long y1 = YLOG2DEV(point->y + yoffset);    // and a waste again...
 292         long y2 = YLOG2DEV(npoint->y + yoffset);
 293         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 294         node = node->Next();
 295
 296         CalcBoundingBox( npoint->x + xoffset, npoint->y + yoffset );
 297     }
 298 }
 299
 300 void wxPaintDC::DrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 301 {
 302     if (!Ok()) return;
 303
 304     if (!n) return;
 305
 306     GdkPoint *gdkpoints = new GdkPoint[n+1];
 307     int i;
 308     for (i = 0 ; i < n ; i++)
 309     {
 310         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 311         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 312
 313         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 314     }
 315
 316     if (m_brush.GetStyle() != wxTRANSPARENT)
 317         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 318
 319     // To do: Fillstyle
 320
 321     if (m_pen.GetStyle() != wxTRANSPARENT)
 322         for (i = 0 ; i < n ; i++)
 323         {
 324             gdk_draw_line( m_window, m_penGC,
 325                            gdkpoints[i%n].x,
 326                            gdkpoints[i%n].y,
 327                            gdkpoints[(i+1)%n].x,
 328                            gdkpoints[(i+1)%n].y);
 329         }
 330
 331     delete[] gdkpoints;
 332 }
 333
 334 void wxPaintDC::DrawPolygon( wxList *lines, long xoffset, long yoffset, int WXUNUSED(fillStyle))
 335 {
 336     if (!Ok()) return;
 337
 338     int n = lines->Number();
 339     if (!n) return;
 340
 341     GdkPoint *gdkpoints = new GdkPoint[n];
 342     wxNode *node = lines->First();
 343     int cnt = 0;
 344     while (node)
 345     {
 346         wxPoint *p = (wxPoint *) node->Data();
 347         gdkpoints[cnt].x = XLOG2DEV(p->x + xoffset);
 348         gdkpoints[cnt].y = YLOG2DEV(p->y + yoffset);
 349         node = node->Next();
 350         cnt++;
 351
 352         CalcBoundingBox( p->x + xoffset, p->y + yoffset );
 353     }
 354
 355     if (m_brush.GetStyle() != wxTRANSPARENT)
 356         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 357
 358     // To do: Fillstyle
 359
 360     if (m_pen.GetStyle() != wxTRANSPARENT)
 361     {
 362         int i;
 363         for (i = 0 ; i < n ; i++)
 364         {
 365             gdk_draw_line( m_window, m_penGC,
 366                            gdkpoints[i%n].x,
 367                            gdkpoints[i%n].y,
 368                            gdkpoints[(i+1)%n].x,
 369                            gdkpoints[(i+1)%n].y );
 370         }
 371     }
 372     delete[] gdkpoints;
 373 }
 374
 375 void wxPaintDC::DrawRectangle( long x, long y, long width, long height )
 376 {
 377     if (!Ok()) return;
 378
 379     long xx = XLOG2DEV(x);
 380     long yy = YLOG2DEV(y);
 381     long ww = m_signX * XLOG2DEVREL(width);
 382     long hh = m_signY * YLOG2DEVREL(height);
 383
 384     // CMB: draw nothing if transformed w or h is 0
 385     if (ww == 0 || hh == 0) return;
 386
 387     // CMB: handle -ve width and/or height
 388     if (ww < 0) { ww = -ww; xx = xx - ww; }
 389     if (hh < 0) { hh = -hh; yy = yy - hh; }
 390
 391     if (m_brush.GetStyle() != wxTRANSPARENT)
 392       gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 393
 394     if (m_pen.GetStyle() != wxTRANSPARENT)
 395       gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 396
 397     CalcBoundingBox( x, y );
 398     CalcBoundingBox( x + width, y + height );
 399 }
 400
 401 void wxPaintDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 402 {
 403     if (!Ok()) return;
 404
 405     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 406
 407     long xx = XLOG2DEV(x);
 408     long yy = YLOG2DEV(y);
 409     long ww = m_signX * XLOG2DEVREL(width);
 410     long hh = m_signY * YLOG2DEVREL(height);
 411     long rr = XLOG2DEVREL((long)radius);
 412
 413     // CMB: handle -ve width and/or height
 414     if (ww < 0) { ww = -ww; xx = xx - ww; }
 415     if (hh < 0) { hh = -hh; yy = yy - hh; }
 416
 417     // CMB: if radius is zero use DrawRectangle() instead to avoid
 418     // X drawing errors with small radii
 419     if (rr == 0)
 420     {
 421         DrawRectangle( x, y, width, height );
 422         return;
 423     }
 424
 425     // CMB: draw nothing if transformed w or h is 0
 426     if (ww == 0 || hh == 0) return;
 427
 428     // CMB: adjust size if outline is drawn otherwise the result is
 429     // 1 pixel too wide and high
 430     if (m_pen.GetStyle() != wxTRANSPARENT)
 431     {
 432         ww--;
 433         hh--;
 434     }
 435
 436     // CMB: ensure dd is not larger than rectangle otherwise we
 437     // get an hour glass shape
 438     long dd = 2 * rr;
 439     if (dd > ww) dd = ww;
 440     if (dd > hh) dd = hh;
 441     rr = dd / 2;
 442
 443     if (m_brush.GetStyle() != wxTRANSPARENT)
 444     {
 445         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 446         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 447         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 448         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 449         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 450         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 451     }
 452
 453     if (m_pen.GetStyle() != wxTRANSPARENT)
 454     {
 455         gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 456         gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 457         gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 458         gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 459         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 460         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 461         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 462         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 463     }
 464
 465     // this ignores the radius
 466     CalcBoundingBox( x, y );
 467     CalcBoundingBox( x + width, y + height );
 468 }
 469
 470 void wxPaintDC::DrawEllipse( long x, long y, long width, long height )
 471 {
 472     if (!Ok()) return;
 473
 474     long xx = XLOG2DEV(x);
 475     long yy = YLOG2DEV(y);
 476     long ww = m_signX * XLOG2DEVREL(width);
 477     long hh = m_signY * YLOG2DEVREL(height);
 478
 479     // CMB: handle -ve width and/or height
 480     if (ww < 0) { ww = -ww; xx = xx - ww; }
 481     if (hh < 0) { hh = -hh; yy = yy - hh; }
 482
 483     if (m_brush.GetStyle() != wxTRANSPARENT)
 484         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 485
 486     if (m_pen.GetStyle() != wxTRANSPARENT)
 487         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 488
 489     CalcBoundingBox( x, y );
 490     CalcBoundingBox( x + width, y + height );
 491 }
 492
 493 bool wxPaintDC::CanDrawBitmap(void) const
 494 {
 495   return TRUE;
 496 }
 497
 498 void wxPaintDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
 499 {
 500     if (!Ok()) return;
 501
 502     if (!icon.Ok()) return;
 503
 504     int xx = XLOG2DEV(x);
 505     int yy = YLOG2DEV(y);
 506
 507     GdkBitmap *mask = (GdkBitmap *) NULL;
 508     if (icon.GetMask()) mask = icon.GetMask()->GetBitmap();
 509
 510     if (useMask && mask)
 511     {
 512         gdk_gc_set_clip_mask( m_penGC, mask );
 513         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 514     }
 515
 516     GdkPixmap *pm = icon.GetPixmap();
 517     gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 518
 519     if (useMask && mask)
 520     {
 521         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 522         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 523     }
 524
 525     CalcBoundingBox( x, y );
 526     int width = icon.GetWidth();
 527     int height = icon.GetHeight();
 528     CalcBoundingBox( x + width, y + height );
 529 }
 530
 531 bool wxPaintDC::Blit( long xdest, long ydest, long width, long height,
 532        wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool useMask )
 533 {
 534     if (!Ok()) return FALSE;
 535
 536     CalcBoundingBox( xdest, ydest );
 537     CalcBoundingBox( xdest + width, ydest + height );
 538
 539     wxClientDC *csrc = (wxClientDC*)source;
 540
 541     if (csrc->m_isMemDC)
 542     {
 543         wxMemoryDC* srcDC = (wxMemoryDC*)source;
 544         GdkPixmap* pmap = srcDC->m_selected.GetPixmap();
 545         if (pmap)
 546         {
 547             long xx = XLOG2DEV(xdest);
 548             long yy = YLOG2DEV(ydest);
 549
 550             GdkBitmap *mask = (GdkBitmap *) NULL;
 551             if (srcDC->m_selected.GetMask()) mask = srcDC->m_selected.GetMask()->GetBitmap();
 552
 553             if (useMask && mask)
 554             {
 555                 gdk_gc_set_clip_mask( m_textGC, mask );
 556                 gdk_gc_set_clip_origin( m_textGC, xx, yy );
 557             }
 558
 559             gdk_draw_pixmap( m_window, m_textGC, pmap,
 560                              source->DeviceToLogicalX(xsrc),
 561                              source->DeviceToLogicalY(ysrc),
 562                              xx,
 563                              yy,
 564                              source->DeviceToLogicalXRel(width),
 565                              source->DeviceToLogicalYRel(height) );
 566
 567             if (useMask && mask)
 568             {
 569                 gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 570                 gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 571             }
 572
 573             return TRUE;
 574         }
 575
 576         GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
 577         if (bmap)
 578         {
 579             long xx = XLOG2DEV(xdest);
 580             long yy = YLOG2DEV(ydest);
 581
 582             GdkBitmap *mask = (GdkBitmap *) NULL;
 583             if (srcDC->m_selected.GetMask()) mask = srcDC->m_selected.GetMask()->GetBitmap();
 584
 585             if (useMask && mask)
 586             {
 587                 gdk_gc_set_clip_mask( m_textGC, mask );
 588                 gdk_gc_set_clip_origin( m_textGC, xx, yy );
 589             }
 590
 591             gdk_draw_bitmap( m_window, m_textGC, bmap,
 592                              source->DeviceToLogicalX(xsrc),
 593                              source->DeviceToLogicalY(ysrc),
 594                              xx,
 595                              yy,
 596                              source->DeviceToLogicalXRel(width),
 597                              source->DeviceToLogicalYRel(height) );
 598
 599             if (useMask && mask)
 600             {
 601                 gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 602                 gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 603             }
 604
 605             return TRUE;
 606         }
 607     }
 608
 609     gdk_window_copy_area ( m_window, m_textGC,
 610                            XLOG2DEV(xdest), YLOG2DEV(ydest),
 611                            csrc->GetWindow(),
 612                            source->DeviceToLogicalX(xsrc),
 613                            source->DeviceToLogicalY(ysrc),
 614                            source->DeviceToLogicalXRel(width),
 615                            source->DeviceToLogicalYRel(height) );
 616
 617 /*
 618     gdk_window_copy_area ( m_window, m_textGC,
 619                            XLOG2DEV(xdest), YLOG2DEV(ydest),
 620                            csrc->GetWindow(),
 621                            xsrc, ysrc,
 622                            width, height );
 623 */
 624
 625   return TRUE;
 626 }
 627
 628 void wxPaintDC::DrawText( const wxString &text, long x, long y, bool WXUNUSED(use16) )
 629 {
 630     if (!Ok()) return;
 631
 632     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 633
 634     x = XLOG2DEV(x);
 635     y = YLOG2DEV(y);
 636
 637     // CMB 21/5/98: draw text background if mode is wxSOLID
 638     if (m_backgroundMode == wxSOLID)
 639     {
 640         long width = gdk_string_width( font, text );
 641         long height = font->ascent + font->descent;
 642         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 643         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 644         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 645     }
 646     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text );
 647
 648     // CMB 17/7/98: simple underline: ignores scaling and underlying
 649     // X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 650     // properties (see wxXt implementation)
 651     if (m_font.GetUnderlined())
 652     {
 653         long width = gdk_string_width( font, text );
 654         long ul_y = y + font->ascent;
 655         if (font->descent > 0) ul_y++;
 656         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 657     }
 658
 659     long w, h;
 660     GetTextExtent (text, &w, &h);
 661     CalcBoundingBox (x + w, y + h);
 662     CalcBoundingBox (x, y);
 663 }
 664
 665 bool wxPaintDC::CanGetTextExtent(void) const
 666 {
 667     return TRUE;
 668 }
 669
 670 void wxPaintDC::GetTextExtent( const wxString &string, long *width, long *height,
 671                      long *descent, long *externalLeading,
 672                      wxFont *theFont, bool WXUNUSED(use16) )
 673 {
 674     if (!Ok()) return;
 675
 676     wxFont fontToUse = m_font;
 677     if (theFont) fontToUse = *theFont;
 678
 679     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 680     if (width) (*width) = long(gdk_string_width( font, string ) / m_scaleX);
 681     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 682     if (descent) (*descent) = long(font->descent / m_scaleY);
 683     if (externalLeading) (*externalLeading) = 0;  // ??
 684 }
 685
 686 long wxPaintDC::GetCharWidth(void)
 687 {
 688     if (!Ok()) return 0;
 689
 690     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 691     return long(gdk_string_width( font, "H" ) / m_scaleX);
 692 }
 693
 694 long wxPaintDC::GetCharHeight(void)
 695 {
 696     if (!Ok()) return 0;
 697
 698     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 699     return long((font->ascent + font->descent) / m_scaleY);
 700 }
 701
 702 void wxPaintDC::Clear(void)
 703 {
 704     if (!Ok()) return;
 705
 706     if (!m_isMemDC)
 707     {
 708         gdk_window_clear( m_window );
 709     }
 710     else
 711     {
 712         int width,height;
 713         GetSize( &width, &height );
 714         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 715     }
 716 }
 717
 718 void wxPaintDC::SetFont( const wxFont &font )
 719 {
 720     if (!Ok()) return;
 721
 722     m_font = font;
 723 }
 724
 725 void wxPaintDC::SetPen( const wxPen &pen )
 726 {
 727     if (!Ok()) return;
 728
 729     if (m_pen == pen) return;
 730
 731     m_pen = pen;
 732
 733     if (!m_pen.Ok()) return;
 734
 735     gint width = m_pen.GetWidth();
 736     // CMB: if width is non-zero scale it with the dc
 737     if (width <= 0)
 738     {
 739         width = 1;
 740     }
 741     else
 742     {
 743         // X doesn't allow different width in x and y and so we take
 744         // the average
 745         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 746         width = (int)w;
 747     }
 748
 749     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 750     switch (m_pen.GetStyle())
 751     {
 752         case wxSOLID:      { lineStyle = GDK_LINE_SOLID;       break; }
 753         case wxDOT:        { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 754         case wxLONG_DASH:  { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 755         case wxSHORT_DASH: { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 756         case wxDOT_DASH:   { lineStyle = GDK_LINE_DOUBLE_DASH; break; }
 757     }
 758
 759     GdkCapStyle capStyle = GDK_CAP_ROUND;
 760     switch (m_pen.GetCap())
 761     {
 762         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 763         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 764         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 765     }
 766
 767     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 768     switch (m_pen.GetJoin())
 769     {
 770         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 771         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 772         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 773     }
 774
 775     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 776
 777     m_pen.GetColour().CalcPixel( m_cmap );
 778     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 779 }
 780
 781 void wxPaintDC::SetBrush( const wxBrush &brush )
 782 {
 783     if (!Ok()) return;
 784
 785     if (m_brush == brush) return;
 786
 787     m_brush = brush;
 788
 789     if (!m_brush.Ok()) return;
 790
 791     m_brush.GetColour().CalcPixel( m_cmap );
 792     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 793
 794     GdkFill fillStyle = GDK_SOLID;
 795     switch (m_brush.GetStyle())
 796     {
 797       case wxSOLID:
 798       case wxTRANSPARENT:
 799          break;
 800       default:
 801          fillStyle = GDK_STIPPLED;
 802     }
 803
 804     gdk_gc_set_fill( m_brushGC, fillStyle );
 805
 806     if (m_brush.GetStyle() == wxSTIPPLE)
 807     {
 808         gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
 809     }
 810
 811     if (IS_HATCH(m_brush.GetStyle()))
 812     {
 813         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
 814         gdk_gc_set_stipple( m_brushGC, hatches[num] );
 815     }
 816 }
 817
 818 // CMB 21/7/98: Added SetBackground. Sets background brush
 819 // for Clear() and bg colour for shapes filled with cross-hatch brush
 820 void wxPaintDC::SetBackground( const wxBrush &brush )
 821 {
 822     if (!Ok()) return;
 823
 824     if (m_backgroundBrush == brush) return;
 825
 826     m_backgroundBrush = brush;
 827
 828     if (!m_backgroundBrush.Ok()) return;
 829
 830     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
 831     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
 832     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 833
 834     GdkFill fillStyle = GDK_SOLID;
 835     switch (m_backgroundBrush.GetStyle())
 836     {
 837       case wxSOLID:
 838       case wxTRANSPARENT:
 839         break;
 840       default:
 841         fillStyle = GDK_STIPPLED;
 842     }
 843
 844     gdk_gc_set_fill( m_bgGC, fillStyle );
 845
 846     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
 847     {
 848         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
 849     }
 850
 851     if (IS_HATCH(m_backgroundBrush.GetStyle()))
 852     {
 853         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
 854         gdk_gc_set_stipple( m_bgGC, hatches[num] );
 855      }
 856 }
 857
 858 void wxPaintDC::SetLogicalFunction( int function )
 859 {
 860     if (m_logicalFunction == function) return;
 861     GdkFunction mode = GDK_COPY;
 862     switch (function)
 863     {
 864         case wxXOR:    mode = GDK_INVERT; break;
 865         case wxINVERT: mode = GDK_INVERT; break;
 866         default:       break;
 867     }
 868     m_logicalFunction = function;
 869     gdk_gc_set_function( m_penGC, mode );
 870     gdk_gc_set_function( m_brushGC, mode );
 871 }
 872
 873 void wxPaintDC::SetTextForeground( const wxColour &col )
 874 {
 875     if (!Ok()) return;
 876
 877     if (m_textForegroundColour == col) return;
 878
 879     m_textForegroundColour = col;
 880     if (!m_textForegroundColour.Ok()) return;
 881
 882     m_textForegroundColour.CalcPixel( m_cmap );
 883     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 884 }
 885
 886 void wxPaintDC::SetTextBackground( const wxColour &col )
 887 {
 888     if (!Ok()) return;
 889
 890     if (m_textBackgroundColour == col) return;
 891
 892     m_textBackgroundColour = col;
 893     if (!m_textBackgroundColour.Ok()) return;
 894
 895     m_textBackgroundColour.CalcPixel( m_cmap );
 896     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
 897 }
 898
 899 void wxPaintDC::SetBackgroundMode( int mode )
 900 {
 901     m_backgroundMode = mode;
 902
 903     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
 904     // transparent/solid background mode
 905     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
 906     {
 907         gdk_gc_set_fill( m_brushGC,
 908           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
 909     }
 910 }
 911
 912 void wxPaintDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 913 {
 914 }
 915
 916 void wxPaintDC::SetClippingRegion( long x, long y, long width, long height )
 917 {
 918     wxDC::SetClippingRegion( x, y, width, height );
 919
 920     GdkRectangle rect;
 921     rect.x = XLOG2DEV(x);
 922     rect.y = YLOG2DEV(y);
 923     rect.width = XLOG2DEVREL(width);
 924     rect.height = YLOG2DEVREL(height);
 925     gdk_gc_set_clip_rectangle( m_penGC, &rect );
 926     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
 927     gdk_gc_set_clip_rectangle( m_textGC, &rect );
 928     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
 929 }
 930
 931 void wxPaintDC::DestroyClippingRegion(void)
 932 {
 933     wxDC::DestroyClippingRegion();
 934
 935     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
 936     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
 937     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
 938     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
 939 }
 940
 941 void wxPaintDC::SetUpDC(void)
 942 {
 943     Destroy();
 944     m_ok = TRUE;
 945     m_logicalFunction = wxCOPY;
 946     m_penGC = gdk_gc_new( m_window );
 947     m_brushGC = gdk_gc_new( m_window );
 948     m_textGC = gdk_gc_new( m_window );
 949     m_bgGC = gdk_gc_new( m_window );
 950     SetTextForeground( m_textForegroundColour );
 951     SetTextBackground( m_textBackgroundColour );
 952     SetPen( m_pen );
 953     SetFont( m_font );
 954     SetBrush( m_brush );
 955
 956     gdk_gc_set_background( m_penGC, wxWHITE->GetColor() );
 957
 958     if (!hatch_bitmap)
 959     {
 960         hatch_bitmap    = hatches;
 961         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
 962         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
 963         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
 964         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
 965         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
 966         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
 967     }
 968 }
 969
 970 void wxPaintDC::Destroy(void)
 971 {
 972     if (m_penGC) gdk_gc_unref( m_penGC );
 973     m_penGC = (GdkGC*) NULL;
 974     if (m_brushGC) gdk_gc_unref( m_brushGC );
 975     m_brushGC = (GdkGC*) NULL;
 976     if (m_textGC) gdk_gc_unref( m_textGC );
 977     m_textGC = (GdkGC*) NULL;
 978     if (m_bgGC) gdk_gc_unref( m_bgGC );
 979     m_bgGC = (GdkGC*) NULL;
 980 }
 981
 982 GdkWindow *wxPaintDC::GetWindow(void)
 983 {
 984     return m_window;
 985 }
 986
 987 // ----------------------------------- spline code ----------------------------------------
 988
 989 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
 990                          double a3, double b3, double a4, double b4);
 991 void wx_clear_stack(void);
 992 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
 993         double *y3, double *x4, double *y4);
 994 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
 995           double x4, double y4);
 996 static bool wx_spline_add_point(double x, double y);
 997 static void wx_spline_draw_point_array(wxDC *dc);
 998
 999 wxList wx_spline_point_list;
1000
1001 #define         half(z1, z2)    ((z1+z2)/2.0)
1002 #define         THRESHOLD       5
1003
1004 /* iterative version */
1005
1006 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1007                  double b4)
1008 {
1009     register double  xmid, ymid;
1010     double           x1, y1, x2, y2, x3, y3, x4, y4;
1011
1012     wx_clear_stack();
1013     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1014
1015     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1016         xmid = (double)half(x2, x3);
1017         ymid = (double)half(y2, y3);
1018         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1019             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1020             wx_spline_add_point( x1, y1 );
1021             wx_spline_add_point( xmid, ymid );
1022         } else {
1023             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1024                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1025             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1026                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1027         }
1028     }
1029 }
1030
1031 /* utilities used by spline drawing routines */
1032
1033 typedef struct wx_spline_stack_struct {
1034     double           x1, y1, x2, y2, x3, y3, x4, y4;
1035 } Stack;
1036
1037 #define         SPLINE_STACK_DEPTH             20
1038 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1039 static Stack   *wx_stack_top;
1040 static int      wx_stack_count;
1041
1042 void wx_clear_stack(void)
1043 {
1044     wx_stack_top = wx_spline_stack;
1045     wx_stack_count = 0;
1046 }
1047
1048 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1049 {
1050     wx_stack_top->x1 = x1;
1051     wx_stack_top->y1 = y1;
1052     wx_stack_top->x2 = x2;
1053     wx_stack_top->y2 = y2;
1054     wx_stack_top->x3 = x3;
1055     wx_stack_top->y3 = y3;
1056     wx_stack_top->x4 = x4;
1057     wx_stack_top->y4 = y4;
1058     wx_stack_top++;
1059     wx_stack_count++;
1060 }
1061
1062 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1063                   double *x3, double *y3, double *x4, double *y4)
1064 {
1065     if (wx_stack_count == 0)
1066         return (0);
1067     wx_stack_top--;
1068     wx_stack_count--;
1069     *x1 = wx_stack_top->x1;
1070     *y1 = wx_stack_top->y1;
1071     *x2 = wx_stack_top->x2;
1072     *y2 = wx_stack_top->y2;
1073     *x3 = wx_stack_top->x3;
1074     *y3 = wx_stack_top->y3;
1075     *x4 = wx_stack_top->x4;
1076     *y4 = wx_stack_top->y4;
1077     return (1);
1078 }
1079
1080 static bool wx_spline_add_point(double x, double y)
1081 {
1082   wxPoint *point = new wxPoint ;
1083   point->x = (int) x;
1084   point->y = (int) y;
1085   wx_spline_point_list.Append((wxObject*)point);
1086   return TRUE;
1087 }
1088
1089 static void wx_spline_draw_point_array(wxDC *dc)
1090 {
1091   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1092   wxNode *node = wx_spline_point_list.First();
1093   while (node)
1094   {
1095     wxPoint *point = (wxPoint *)node->Data();
1096     delete point;
1097     delete node;
1098     node = wx_spline_point_list.First();
1099   }
1100 }
1101
1102 void wxPaintDC::DrawSpline( wxList *points )
1103 {
1104     wxPoint *p;
1105     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1106     double           x1, y1, x2, y2;
1107
1108     wxNode *node = points->First();
1109     p = (wxPoint *)node->Data();
1110
1111     x1 = p->x;
1112     y1 = p->y;
1113
1114     node = node->Next();
1115     p = (wxPoint *)node->Data();
1116
1117     x2 = p->x;
1118     y2 = p->y;
1119     cx1 = (double)((x1 + x2) / 2);
1120     cy1 = (double)((y1 + y2) / 2);
1121     cx2 = (double)((cx1 + x2) / 2);
1122     cy2 = (double)((cy1 + y2) / 2);
1123
1124     wx_spline_add_point(x1, y1);
1125
1126     while ((node = node->Next()) != NULL)
1127     {
1128         p = (wxPoint *)node->Data();
1129         x1 = x2;
1130         y1 = y2;
1131         x2 = p->x;
1132         y2 = p->y;
1133         cx4 = (double)(x1 + x2) / 2;
1134         cy4 = (double)(y1 + y2) / 2;
1135         cx3 = (double)(x1 + cx4) / 2;
1136         cy3 = (double)(y1 + cy4) / 2;
1137
1138         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1139
1140         cx1 = cx4;
1141         cy1 = cy4;
1142         cx2 = (double)(cx1 + x2) / 2;
1143         cy2 = (double)(cy1 + y2) / 2;
1144     }
1145
1146     wx_spline_add_point( cx1, cy1 );
1147     wx_spline_add_point( x2, y2 );
1148
1149     wx_spline_draw_point_array( this );
1150 }